Automatic shut-off for liquid-delivery systems



A 14, 1929. .1. J. HAWXHURST 1712'498 AUTOMATIC SHUT-OFF FOR LIQUIDDELIVERY SYSTEMS Filed March 1'7, 1927 L la-:2. I

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IN V EN TOR.

' v MXQWA ATTORNEY' li utented May 14, 1929.

UNITED STATES PATENT OFFICE.

JOHN J. HAWXHURST, OF BROOKLYN, NEW YORK, ASSIGNOB, BY DIRECT AN D MEBNEASSIGNMENTS, T LIQUID DISPENSING SYSTEMS, INC., 01 BROOKLYN, NEW YORK,

A CORPORATION OF NEW YORK.

AUTOMATIC SHUT-OFF FOR LIQUIIlD-DELIVERY SYSTEMS.

Application filed March 17, 1927. Serial No. 176,258.

This invention relates to the delivery and dispensing of liquids and theobjects of the invention are to automatically shut 03 the source ofsupply in the event of injury or dans ger to the system and to providethe means ror this purpose in a simple practical form readily applicableto existing systems.

The foregoing and other desirable resuits are attained by certain novelfeatures lo of construction, combination and arrangement of parts as setforth in the following specification.

The drawing accompanying and forming part of this specificationillustrates an emodiment of the invention in one of its commercialforms, but it will be understood from thebroad spirit and scope of thefollowing description and claims that the structure may be modified invarious respects without departure from the true spirit and scope of theinvention.

Figure 1 is an elevation of a delivery stand such as is used in thedispensing of gasoline and the like with a form of the invention in- 25dieated in dotted lines as incorporated in the base of the stand.

Figure 2 is an enlarged broken sectional view of this particularform ofthe mechanism.

Figure 3 is a horizontal sectional view as on the plane of line 3-3 ofFigure 2.

In the present illustration the invention is shown applied to and usedin conjunction with a gasoline dispensing system, one of the deliverystands of such a system being indi cated at 5 and shown as having theusual hose 6 for delivering the liquid. The liquid is carriedto thishose by suitable piping 7 extending up through the stand.

it is reco ized that these stands constitute a considera le hazard. Thehose is liable to be torn from its connections by careless handling anduse and the supply line is liable to be broken or made to leak bycollision with the stand. In the event of fire, the supply lineconstitutes an immediate and continuing menace.

These dangers are removed in the presnt invention by the rovision ofvalve meansin the supply line which automatically shuts ofi the supplyof liquidin the event of any such hazards.

The automatic valve mechanism takes the form in the present disclosureof a valve cas- Eli all!

ing 8 having a through passage connected at 56 one side with the pi e 9leadin from the supply tank and at t e other si e with the delivery line7 extending up through the stand. This through passage is controlled bya valve 10 engageable with a seat 11 in a 00 transverse wall 12 acrossthe passage and said valve is shown as carried by a stem 13 extendmg upthrough a suitable land or stufling box 14. This valve is of t eautomatically closing type, made so b a spring 15 exerting lts force toshift the va ve in a seating direction and also by an adjustable Wei ht16 on the long arm of a lever 17 pivote at 18 in a frame 19 and having aforked connection with the upper end of the valve stem at 20.

The automatic valve is normally held open, in the present disclosure, bya tumbler or trigger shown in the form of a rod 21 having a ball andsocket mountin 22 in the frame and provided at its lower on with apointed 76 termlnal 23 bearing on the reduced surface provided by thefrusto conical upper end 24.- of the valve stem. The tri ger rod 21extends up into the casing or hol ow column of the stand a suitabledistance and carries some kind of a head adapted to be engaged by thestand in the event of any dangerous shifting of the same. This head isshown as consisting of a series of radiating pins 25 extending intoclose relation with the inner wall of the convergent portion of thestandard. A relatively slight shifting of the standard, therefore, willsuffice to throw the trip red one way or the other far enough to releasethe point of the same from holding engagement with the valve. The valve,therefore, will thus snap closed and shut oil the supply of liquid tothe standard if the standard is shifted as by collision of a motor cartherewith. Preferably, the parts are so designed and arranged that thisautomatic shut-off will be efi'ected before the shifting of the standardis sufilcient to actually injure the piping.

When the shut-oil valve snaps closed, as described, the supply of ii uidis automatical- 10o ly directed from t 1.6 stan through a pipe 26entered in the bottom of the valve casing, which pipe may lead back tothe supp tank. Entrance to this return pipe is shut o in the normalposition of the parts by a valve face 106 27 at the under side of valve10 enga ing a valve seat 28, the latter being provi ed at the inner endof a plug 29 screwed into the a 'to automaticafi y snap bottom of thevalve casing and having a screw seat for the return pipe 26.

In the form of the invention herein disclosed, the same valve isutilized to guard the stand against fire hazards by making the upper end13- of the valve stem as a separate part secured to the main body of thestem y an inclined soldered joint 30 constitutin a fusible link. Thefusibility of this lin is such that at a predetermined temperature, thestem will 've way and permit the valve closed under power of the valveclosing spr1n 15.

After the valve has con tripped the same may be restored to normal openosition by forcing down the valve stem, eit er directlyor by using thelever 17 as an operating handle, access being had through the base ofthe stand as b means of a suitable door 31 provided in the ase of thestand.

The automatic valve mechanism may all be located in a suitable well 32provided in the concrete foundation 33 on which the stand is mounted.

What is claimed is:

1. In combination, a dispensing stand containing a liquid delivery line,valve mechanism at the foot of said stand controlling flow through saiddelivery line and mechanism affected by movement of said stand tocontrol operation of the valve mechanism to automatically shut ofi' thesupply of liquid, said valve mechanism further including means forautomatically diverting liquid from the stand when the su ply to thestand is thus cut oil.

2. In com ination, a dis ensing stand containing' a liquid delivery me,automatically closing valve mechanism at the 'foot of said standcontrolling flow throu h said delivery line and mechanism affected y'movement of said stand to control operation of the valve mechanism topermit automatic closing of the valve mechanism, the control mechanismfor said valve further including thermally responsive means foroverningautomatic shut-ofi' action of the va ve.

3. An automatic shut-off for liquid delivery stations comprisin a valvecasing adapted to be interposed in a iquid delivery line, a valve insaid casing controlling flow therethrough, said valve havin a stem, ashiftable trigger engaged with sai valve stem to hold the valve open andmeans for automaticall closing the valve when the same is released bysaid triger, said valve casing having an outlet for y-passing the liquidfrom the dellvery line and valve means associated with said valve stemfor closing said-outlet when the main valve is open and for opening saidoutlet when the main valve is closed.

4. An automatic shut-ofl' for liquid deliver stations comprising a valvecasing adapte to be interposed in a liquid delivery line, a

valve in said casin controlling flow theretrigger engaged with saidvalve stem to hold the valve open and means for automatically closingthe valve when the same is released by said trigger, the valvestemhaving a fusibly connected section adapted to ermit automaticclosure of the valve un er predetermined heat conditions.

5. An automatic shut-oi! for liquid delivery stations comprising a valvecasing adapted to be inter d in a liquid delivery line, a valve in saicasin therethrough, said valve aving a stem, a shiftable trigger engagedwith said valve stem to hold the valve 0 en, means for automaticallyclosing the va ve when the same is released by said trigger and a ivotedshifting lever connected with the va ve stem.

6. An automatic shut-otf for liquid delivery stations comprising a valvecasing adapted to be interposed in a liquid delivery line, a valve insaid casing controlling flow therethrough, said valve havin a stem, ashlftable trigger engaged with sai valve stem to hold the valve open,means for automatically closing the valve when the same is released bysaid trigger and a pivoted shiftin lever connected with the valve stem,said ever carrying a weight for assisting in closing the valve andserving also as a handle for shifting the valve in the openingdirection.

7. An automatic shut-ofi' for liquid delivery stations comprising avalve casing having a through passa and a return passage, valve means insai casing for.clos1ng one passage while openin the other, a mechanicaltri er and thermal y responsive means for tions and means forautomatically shi ing controlling flow the valve means to the other ofsuch positions when permitted by either the mechanical trigger or thetemperature res nsive device.

8. An automatic shut-ofi for iquid delivery stations comprising a valvecasing having a through passage, a valve in said casing controlling saidassage and provided with a stem, a shifta le rod engageable with saidstem to hold the valve open, means for shifting the valve closed whenreleased by said rod, said rod having ortions for engagement by a partwhich is to protected.

9. An automatic shut-ofi for liquid-delivery stations comprising a valvecasing having a through passage, a valve in said casing controlling saipassage and provided with a stem, a shiftable rod engageable with saidstem to hold the valve open, means for shifting the valve closed whenreleased by said rod, said rod having portions for engagement by a partwhich is to be protected, the valve stem and rod having engagin portionsof reduced cross sectional area an the stem having a fusibly connectedend portion.

In witness whereof, I have hereunto set my hand this 15th day of March,1927.

JOHN J. HAWXHURST.

